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CVE-2021-39150 is an unsafe deserialization vulnerability in XStream, a Java XML serialization library. In affected deployments using Java runtime versions 8 through 14, an attacker able to manipulate an input stream processed by XStream can abuse deserialization of internal web-service client classes to cause server-side requests to internal resources. Deployments that use XStream's default blacklist-based security framework are affected; configurations using a whitelist restricted to the minimum required types are not affected.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository demonstrates proof-of-concept exploits for multiple vulnerabilities in XStream <= 1.4.17 (CVE-2021-39141, CVE-2021-39144, CVE-2021-39150, CVE-2021-39152). The structure includes a Maven project with Java source files and a malicious XML payload. The main files are: - HttpStarter.java: Implements an HTTP server on port 8080 with a /test endpoint that accepts POST requests containing XML data. The XML is deserialized using XStream without security restrictions, making it vulnerable to RCE and SSRF attacks. - XstreamDemo.java: Demonstrates local deserialization of a malicious XML file (test.xml) using XStream, which can trigger the exploit. - test.xml: Contains a serialized Java object payload designed to exploit the deserialization vulnerability. The README provides context, affected CVEs, and usage instructions. The exploit allows attackers to send crafted XML payloads to the vulnerable endpoint, resulting in remote code execution or SSRF, depending on the payload. The repository is a functional POC for XStream deserialization vulnerabilities, suitable for both local and remote testing.
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An XStream server-side request forgery vulnerability through unsafe deserialization of com.sun.xml.internal.ws.client.sei classes.
XStream server-side request forgery through unsafe deserialization of internal web-service client classes.
XStream server-side request forgery vulnerability via unsafe deserialization of com.sun.xml.internal.ws.client.sei classes.
XStream server-side request forgery vulnerability through unsafe deserialization of com.sun.xml.internal.ws.client.sei classes.
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Cross-references every affected SKU, including bundled OEM variants.
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